American slang meaning "desperately waiting for".
Example of the use of the word "Jonesing", from a Beastie Boys song, "Shake your rump"...
now Randy listen I rock a house party at the drop of a hat
I beat a biter down with an aluminum bat
A lot of people they be Jonesin' just to hear me rock the mic
They'll be starin' at the radio staying up all night...